Loose-leaf binder.



No.85 1,622. PATBNTED MAY 21, 1907. D.S.BAIRD.

' LOOSE LEAF BINDER. APPLICATION FILED JUNE 20. 1906.

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No. 854,622. 1 PATENTED'MAY 21, 1907. D. S. BAIRD.

LOOSE LEAF BINDER. V

APPLIUATION FILED JUNE 20. 1906.

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UNITED STATES PATIENT DANIEL SMITH BAIRD, OF

TORONTO, ONTARIO, CANADA, ASSIGN OR TO THE L OF CANADA.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented May 21, 19Q'7.

Application filed June 20, 1906. Serial No. 322,624.

To all whom it may concern:

Be it known that I, DANIEL SMITH BAIRD, of the city of Toronto, in thecounty of York and Province of Ontario, Canada, have invented certainnew and useful Improvements in Loose-Leaf Binders; and I hereby declarethat the following is a full, clear, and exact description of the same.I

This invention relates to a loose leaf binder comprising in itsconstruction a binder back ,cons1sting of a middle member, two sidemembers located at opposite sides of the mid dle member, an operatingscrew mounted in bearings connected to the inner face of the middlemember, two wrist plates pivoted within the binder back, a slide-nutmovable on the operating screw, a link connected with the wrist platesand intermediate the wrist plates with the slide-nut whereby it willoscillate the wrist plates during the movement of the slide-nut, and twosets of links having their inner ends pivotally connected to the wristplates on lines passing through the wrist plate pivots transversely tothe length of the operating screw and on opposite sides of and at thesame distance therefrom, and having their outer ends pivotally connectedto the side members on lines passing diametrically through the wristplate pivots at substantially right angles to the length of theoperating screw whereby the links of each set may move in substantiallyparallel planes during the oscillation of the wrist plates and duringsaid movement constantly exert their lines of force on the side membersat substantially right angles to the length of the operating screw ashereinafter set forth and particularly pointed out in the appendedclaims.

In the drawings: Figure 1 is a perspective view of a loose leaf bindershowing the parts in their expanded positions. Fig. 2 is a similar viewto Fig. 1, showing the same parts contracted. Fig. 3 is a plan view of aloose leaf binder with the parts in the position shown in Fig. 1, butshowing the file posts and tubes broken away. Fig. 4 is a similar viewto Fig. 3, but with the parts in the position shown in Fig. 2. Fig. 5 isa longitudinal section taken along the longitudinal axis of theoperating screw. Fig. 6 is a transverse section taken at right angles toFig. 5, through the pivot of one of the wrist plates, and Fig. 7 is aperspective view of a loose leaf binder showing a modified form of theslide-nut and the link connecting the slide-nut and wrist plates.

Like characters of reference refer to like parts throughout thespecification and drawlngs.

The binder back comprises a middle member a and two laterally movableside members b 6 contained when in their contracted position within themiddle member. Mounted in bearings d secured to the inner face of themiddle member a is the operating screw 0. At the sides of the operatingscrew 0 are guards 6 extending lengthwise on the inner face of saidmiddle member at each side of said operating screw and projecting abovethe top thereof. One end of the operating screw extends to the adjacentend of the middle member to receive the turning device 0 andlongitudinally movable on the operating screw between its ends is aslide-nut f which may engage the inner faces of the sides, and hasflanges g which ride on the top, of the guardse to prevent therevolution of the slidenut as its position is altered by the rotation ofthe operating screw.

Near each end of the middle member a is a wrist plate support h andpivoted to the wrist plate supports h are wrist platesi having theirpivots j on a line parallel with the longitudinal axis of the operatingscrew. Connected to the wrist plates i by pivots Zis a link is.

The inner ends of the links p p are connected to their respective wristplates i by pivots 0 arranged on lines passing through the wrist latepivots transversely to the length of t 1e operating screw and the outerends of the links p p are connected to lugs g on the inner faces of theside members by pivots 1" arranged on lines passing diametrically throuh the wrist plate pivots j at substanti ally rig t angles to the lengthof the op erating screw so that the links may constantly move inparallel planes during the oscillation of the wrist plates and exerttheir lines of force on the side members at substantially right anglesto the length of the screw.

The contracted position of the parts is that shown in Figs. 2 and 4 inwhich the connecting links p p of each set are in contact with eachother across their respective wrist plates. The revolution of theoperating screw to open the binder causes the slide-nut to move in thedirection indicated by the arrow shown in Fig. 4, and this movement ofthe slide-nut actuates the link is and causes it to oscillate the Wristplates so that they will move the connecting links outwardly in parallel planes to expand the side members of the binder outwardly from themiddle member. The links p p during the outward movement exert theirlines of force on the piyots 1" so that side members will. be caused tomove outwardly in planes parallel to those of their contracted position.By means of this construction the full power of the operating screw isutilized in expanding and contracting the middle members the contractingmovement being merely the reverse of the expanding movement abovedescribed.

As shown in Figs. 1 to 6, the link 7c is pivotally connected to theslide-nut f, by a pin m which causes the link 7c to move longitudinallyon the operating screw in unison with the slide-nut and upon which thelink 7c rocks during the oscillation of the wrist plates as the sidemembers expand and contract.

In Fig. 7, the slide-nutf is provided with a slideway f arrangedtransversely to the length of the operating screw and the link 7c" isformed with a tongue k which moves in the slideway f. During theactuation of the slidenut, shown in Fig. 7, the link 7c causes theoscillation of the wrist plates, and as the pivotal connections of thehnk with the wrist plates pass the imaginary lines passing through thewrist plate pivots at right angles to the length of the operating screwthe wrist plates cause the link /c to move toward and from the operatingscrew, and during such movements the tongue and slideway maintain thelink 7c constantly parallel with the operating screw.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent is:

1. A loose leaf binder comprising in its construction a binder backconsisting of a middle member and two laterally movable side memberslocated at opposite sides of the middle member, an operating screwmounted in bearings connected to the binder back, two wrist platespivoted within the binder back, a slide-nut movable on the operatingscrew, a link actuated by the slide-nut and pivotally connected with thewrist plates whereby it will oscillate them during the movement oftheslide-nut, two sets of links pivotally connected to the wrist plateson opposite sides of the wrist plate pivots and pivotally connected totheir respective movable side members at substantially right angles tothe length of the operating screw whereby the links of each set may movein substantially parallel planes during the oscillation of the wristplates and during said movement constantly exert their lines of force onsaid movable side members at substantially right angles to the length ofthe screw.

-members on lines passing 2. Aloose leaf binder comprising initsconstruction a binder back consisting of a middle member and twolaterally movable side members located at opposite sides of the middlemember, an operating screw mounted in bearings connected to the binderback, two wrist plates pivoted within the binder back, a slide-nutmovable on the operating screw, a link actuated by the slide-nut andpivotally connected with the wrist plates whereby it will oscillate themduring the movement of the slide-nut and two sets of links having theirinner ends pivotally connected to the wrist plates on opposite sides ofthe WIlSl] plate pivots and at the same distance there from and havingtheir outer ends pivotally connected to their respective movable sidediametrically through the wrist plate pivots at substantially rightangles to the length of the operating screw whereby the links of eachset may move 1n substantially parallel planes during the oscillation ofthe wrist plates and during the said movement constantly exert theirlines of force on said movable members at substantially right angles tothe length of the screw.

3. A loose leaf binder comprising in its construction a binder backconsisting of a middle member and two laterally movable side memberslocated on opposite sides of the middle member, an operating screwoperatively mounted in the binder back, two wrist plates pivoted withinthe binder back, a slide-nut movable on the operating screw, a linkactuated by the slide-nut and pivotally connected with the wrist plateswhereby it will oscillate them during the movement of ICC the slide-nutand two sets of links pivotally connected to the wrist plates and totheir respective movable side members.

4. Aloose leaf binder comprising in itsconstruction a binder backconsisting of a middle member, and two laterally movable side memberslocated at opposite sides of the middle member, an operating screwmounted in bearings connected to the binder back, two wrist platespivoted within the binder back, a slide-nut movable on the operatingscrew, a slide-Way in the slide-nut arranged transversely to the lengthof the operating screw, a link, a tongue for the link slidably containedwithin the slideway, said link being pivotally connected with the wristplates whereby it will oscillate them during the movement of theslide-nut on the operating screw, two sets of links pivotally connectedto the wrist plates on opposite sides of the wrist plate pivots, andpivotally connected to thelr respective movable side members atsubstantially right angles to the length of the operating screw.

5. A loose leaf binder comprising in its construction a binder back,consisting of a middle member, and two laterally movable side memberslocated at opposite sides of the middle member, "an operating screwmounted in bearings connected to the binder back, two

Wrist plates pivoted Within the binder back, guards Within the binderback at the sides of the operating screw, a slide-nut movable on theoperating screw and engaging the guards, a slideway in the slide-nuttransverse to the length of the operating screw, a link, a tongue forthe link contained in the slideway Whereby the slide-nut can actuate thelink during its movement on the operating screw, said link beingpivotally connected with the Wrist plates whereby it will oscillate themduring its movement with the slide-nut, and two sets of links havingtheir inner ends pivotally connected to the wrist plates on oppositesides of the Wrist plate pivots and havin their outer ends pivotallyconnected to their respective movable side members.

Toronto, June 12th, 1906.

DANIEL SMITH BAIRD. Signed in the presence of:

CHAS. H. RIoHEs, H. L. TRIMBLE.

